A catch-all feature that is enabled for a specific email mailbox will permit you to receive emails that are sent to addresses that do not actually exist. In other words, if you deactivate an email address and someone still sends an email to it, or to any mistyped address under the exact same domain name, you will get the message in the catch-all mailbox. Using this feature means that you won’t miss an email for any reason, which could be crucial if you run some company, for example. Since you may start receiving junk messages, you can use the catch-all option with email filters in order to receive only legitimate messages in your inbox. Only one mailbox per domain name can be a catch-all one and email forwarding cannot be set up for a catch-all mailbox.